AGN feedback and the origin and fate of the hot gas in early-type galaxies
Abstract
We present the results of two-dimensional, grid-type hydrodynamical simulations, with parsec-scale central resolution, for the evolution of the hot gas in isolated early-type galaxies (ETGs). The simulations include a physically self-consistent treatment of the mechanical (from winds) and radiative AGN feedback, and were run for a large set of realistic galaxy models. AGN feedback proves to be very important to maintain massive ETGs in a time-averaged quasi-steady state, keeping the star formation at a low level, and the central black hole mass on observed scaling relations. A comparison with recent determinations of the X-ray properties of ETGs in the local universe shows that, at later epochs, AGN feedback does not dramatically alter the gas content originating in stellar recycled material. Thus, the present-day X-ray luminosity is not a robust diagnostic of the impact of AGN activity, within a scenario where the hot gas mostly originates from the stellar population.
- Publication:
-
Perseus in Sicily: From Black Hole to Cluster Outskirts
- Pub Date:
- 2020
- DOI:
- 10.1017/S1743921318003745
- Bibcode:
- 2020IAUS..342...97P
- Keywords:
-
- ISM: evolution;
- galaxies: elliptical and lenticular;
- cD;
- galaxies: evolution;
- galaxies: ISM;
- galaxies: nuclei;
- X-rays: galaxies;
- X-rays: ISM